I brewed a chocolate cherry stout after drinking Great divides oak aged chocolate Yeti. Yesterday, I drank the Southern Tier choklat and they're very similar. Both are extremely chocolatey, and great brews. I can tell you that 4 oz of chocolate extract at bottling is nowhere near the intense chocolate flavor of ST. I also used 8 oz cocoa powder at the end of the boil, and another 8 oz of cocoa powder in secondary, and my beer is nothing even NEAR the amount of chocolate flavor of ST's, OR GD's. I want that chocolate flavor, but definitely got nothing near it. The aroma is chocolate, but not the flavor. I think maybe nibs in the secondary will be my next attempt, or some way of mixing the chocolate in every couple days. It seemed like the chocolate just clumped up at the bottom and the wort just sat on it. I'll try again, and just go way overboard on the chocolate.